Method:1. Heat 1 tblsp oil in a pan.2. Saute the onions.3. Add mor milagai, tamarind and salt.4. Remove and cool.5. Grind to a paste and keep aside.6. Heat the remaining oil in the pan.7. Fry the mustard seeds and fenugreek seeds.8. Add the ground paste and stir well.9. Remove when oil starts to separate.10. This stays good for a week.